Ito try mo:
End Firefox processes
If Firefox did not shut down normally when you last used it, Firefox might still be running in the background, even though it is not visible. If you try to open it while it's running, an error message will appear with the option to click Close Firefox. If that doesn't solve the problem, restart your computer or try the following options.
Use the Windows Task Manager to close the existing Firefox process
- Right-click on an empty spot in the Windows task bar and select Task Manager (or press Ctrl+Shift+Esc).
- When the Windows Task Manager opens, select the Processes tab.View attachment 1815986
- Select the entry for firefox.exe (press F on the keyboard to find it) and click End Process.
- Click Yes in the "Task Manager Warning" dialog that appears.
- Repeat the above steps to end all additional firefox.exe processes, then exit the Windows Task Manager.
- Start Firefox normally.
Remove the profile lock file
Firefox may have shut down abnormally, leaving the lock file in place. To fix this, open the profile folder (see
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Remove the -no-remote startup option
If you start Firefox with th-e -no-remote
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Initialize the connection to a file share
If you store the profile on a file share, try accessing the file share beforehand using Windows Explorer.
Check access rights
Firefox must also have the right to create files in the profile folder. The error can occur if you try to use a profile from a file system mounted with read-only permission (e.g. a remote Windows share which doesn't have "Allow network users to change my files" checked).
To check if the profile folder has the proper permissions:
- Find your Firefox profile folder - see You do not have permission to view the full content of this post.
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- If you only have one profile, its folder would have "default" in the name.
- Right-click on your profile folder and select Properties.
- Click on the General tab.View attachment 1815987
- Make sure Read-only is not checked marked.
Restore data from a locked profile
If you are unable to unlock the profile using the above methods,
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Source: Firefox